My gas gas furnace was only 3 years ancient when it needed to be complete replaced. Because I definitely never busy professional maintenance, the manufacturer’s warranty was no longer at all valid. I was not aware of the importance of typical service. In the space where I personally live, the gas furnace only runs for several weeks per year. With such a minimal workload, I simply figured I could depend on the heating plan to run reliably without investing in any sort of annual upkeep. I have since l gained that dust accumulates within the plan while it hangs out and sits idle. Dust, pollen, dander, lint and other debris restricts moving parts and very nearly blocks airflow. This causes the gas furnace to task much harder and longer to easily maintain a comfortable temperature within the home. The longer cycles resulted in the gas forced air furnace overheated and quitting. When I called the Heating & A/C dealer, I assumed at once that the service would be minor. After inspecting the equipment, the dealer informed at once that there was hairline crack in the heat exchanger. He then told myself and others that a brand new, modern heat exchanger costs more than a whole modern gas furnace. The heat exchanger in the furnace is extremely important because it separates the combustion byproducts straight out from the breathing air. Combustion byproducts include formaldehyde and airborne carbon monoxide and are dangerous to breathe. I was forced to take out a loan to entirely cover the cost of the modern gas furnace. Once the upgrade process was complete, I was smart. I instantly enrolled in a proactive service method with the Heating & A/C dealer.